38 mm brads you are very hard pushed to pull them apart
how do you pull them apart if you need to change the foundation ?
Can of worms question there..............
OK.....well for a start we NEVER remove bottom bars for foundation renewal. In the past when using prewired foundation then yes, you have wedge bars, grooved sides, and thin gaps between bottom bars to consider.
These days we have cross wired every frame (ok some Smtih ones still to finish, but mostly done) and we get the foundation made slightly short sized, both side to side and top to bottom. All NEW frames we have made now also have a wider groove in the top bar and we never detach the wedge (they only actually have the wedge because people we sell them to still like to do it the traditional British way). They also have no grooves in the side bars and we did away with the 'V' at the lugs, its not necessary. (The wide groove, and extra robust bottom bars, are to accommodate plastic foundation for tose who choose that.)
When replacing the wax you just steam or cutout the old comb carefully, steaming or boiling until asll the wax has come away from the groove in the top bar. Between the bottom bars usually goes first, but its not relevant anyway.
Then you just check the wires for tension, stretching with a drawing pin if needed, and electrically embed a new sheet of foundaton onto the wires, with the head of the sheet up inside the groove in the topbars, and ending about a quarter to half inch short of the bottom bars.
Why end short? Well you then NEVER get the little bit of 'bellying' where the foundation meets the bottom bars, and every comb is drawn perfectly flat. The bees joining the comb onto the bottom bars themselves does seem to lead to a stronger comb. (The exception here being in bottom boxes, where they may not like to join them in some cases)
Its also blindingly fast. Takes one person 3 to 4 minutes to rewax a whole box of 10 after the boiling/steaming has been done. Not terribly unusual for one of our girls (the fastest one) to get through 80 boxes a day, inclusive of time lost faffing about.
We assemble frames in a manner that is the result of the intention NEVER to take them apart. Full frame clean manually is more expensive than buying a new one.